
The Chestnut-bellied Flowerpiercer (Diglossa gloriosissima) is a specialized bird found in the forests of Colombia. It has a brownish body, a chestnut-colored belly, and a curved bill with a sharp tip. It feeds on nectar by piercing the base of flowers, accessing the sugary reward. It also plays a crucial role in pollination as it moves from flower to flower. One of the most beautiful of all flowerpiercers, found only at high elevations near tree line in Colombia’s western Andes. Adult is black with a chestnut belly and silvery shoulder patch. Young birds are duller and browner. Also note the oddly shaped bill with a hooked tip, used to penetrate the bases of flowers to extract nectar. Inhabits scrub and stunted forest, and visits hummingbird feeders in at least one location. Song, often quite long, consists of squeaky chirps that constantly change in pitch.
Habitats & Distribution
The Chestnut-bellied Flowerpiercer inhabits the dense montane forests and subtropical or tropical moist montane ecosystems. Its preferred environments feature rich, lush vegetation, often at elevations ranging from 2,200 to 3,200 meters. These birds thrive in regions with abundant flowering plants, which are essential for their specialized feeding habits. Geographically, the Chestnut-bellied Flowerpiercer is endemic to Colombia. Its distribution is primarily concentrated in the Andes, specifically within the Western and Central Cordilleras. The species is relatively localized, found in fragmented populations that align with the availability of its montane forest habitats.
Behaviours & Reproduction
The Chestnut-bellied Flowerpiercer displays monogamous mating habits, with pairs forming strong bonds during the breeding season. Males engage in elaborate courtship displays, including singing and showcasing their plumage to attract females. These birds typically nest in shrubs or low trees, constructing cup-shaped nests from plant fibers and moss. Both parents share the responsibility of incubating the eggs and feeding the altricial chicks once they hatch. Their social structure tends to be relatively solitary or in pairs outside the breeding season, although they may join mixed-species foraging flocks. Unique among flowerpiercers, they possess a specialized bill adapted to pierce the base of flowers, allowing them to feed on nectar—a trait that also influences their territorial behavior, as they defend nectar-rich areas from intruders to ensure adequate food supply for their offspring.
Diet
Nectar, small insects
Colors
Adult is black with a chestnut belly and silvery shoulder patch. Young birds are duller and browner.
Fun Facts
Endemic. It is one of several species of flowerpiercers, which have specialized bills for piercing flowers and accessing nectar.
Conservation Status & Efforts
The Chestnut-bellied Flowerpiercer (Diglossa gloriosissima) is classified as Vulnerable on the IUCN Red List, with its population estimated to be in a downward trend. Primary threats to the species include habitat loss due to agriculture, deforestation, and human encroachment. Fragmentation of its montane forest habitat in the Andes of Colombia is particularly concerning, as it restricts the bird's range and limits its resources. Conservation efforts for the Chestnut-bellied Flowerpiercer focus on habitat protection and restoration. Initiatives such as the establishment of protected areas and reserves aim to preserve critical forest habitats. Additionally, some local conservation organizations work on reforestation projects and engage with local communities to promote sustainable land-use practices. Research and monitoring programs are also being developed to better understand the species' ecology and inform future conservation actions.